The For Inspiration and Recognition of Science and Technology (FIRST) Robotic Challenge is a great way to get high school students involved in engineering. Lunacy is the 2009 competition which mimics the low friction environment on the moon (using a slick surface and slick wheels on the robots). For more information see the competition manual and related documents.
Related: FIRST Robotics in Minnesota – Kids Fuse Legos and Robotics at Competition – La Vida Robot – Northwest FIRST Robotics Competition – 2006 FIRST Robotics Competition Regional Events

This sounds like it could be fun, i wish i had something like this when i was a kid.
Pingback: Curious Cat Science and Engineering Blog » Building Engineers by Letting Kids Build Robots
Pingback: Curious Cat Science and Engineering Blog » Young Engineers Take LEGO ‘Bots For a Swim